Sprocket-chain.



PATENTED SEPTJ24, 1907.

R. s. MoINTYRE. SPROGKET CHAIN. APPLICATION FILED JUNE 12. 1907.

m5 SE5 ATTORNEYS 1n: Nanms #21:: co, WASHINGTON, n. c.

ROBERT SAFFORD McINTYltE, OF RIVERSIDE, CALIFORNIA.

SPROCKET-CHAIN.

Specification of Letters Patent.

Patented Sept. 24, 1907.

Original application filed February 23, 1905, Serial No. 246,871.Divided and this application filed June 12, 1907. Serial No. 378,492.

a citizen of the United States, and a resident of Riverside, in thecounty of Riverside and State of California, have invented a new andImproved Sprocket- Ohain, of which the following is a full, clear, andexact description. I

This invention relates to a sprocket chain, and the presentspecification is a division of the original specification claiming thisinvention, filed by me February 23, 1905, Serial No. 246,871.

The object of the invention is to produce a sprocket chain of simpleform, which is constructed with a .special view to preventing itsbecoming dislodged from the sprocket wheels over which itruns, Withoutin any way detracting from the eificiency'of the chain in operation.

The invention consists in the construction and combinationof parts to bemore fully described hereinafter and particularly set forth in theclaims.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of a short portion of a chain constructedaccording to my invention; 2 is a plan view of the parts of the chainshown in Fig. 1; and Fig. 3 is a cross section through the chain, takenon the line 33 of Fig. 2, and showing, also, a portion of a gear wheelwith which the chain cooperates. I

Referring more particularly to the parts, 1 represents the sprocketlinks; these links are formed on their under sides with V-shapedsprocket teeth 2 that are connected together to form a continuous chainin 'which the links are arranged in pairs alternately within and withouteach other, as indicated, the ends of the links being connected by pivotpins or bolts 3. In this way the sprocket links are divided into twosets.

l represents the sets of those links which are disposed. on the outside,while 1 represents the links which are disposed on the inside of theothers. Between the links 1 plain links 4 are provided, which are notprovided with teeth. These links 4 are disposed centrally between thelinks 1 their ends are fastened to the pins 3 between guide links orguide plates 5. These guide plates are fastened in the chain like links,but are provided with downwardly projecting fins 6, as indicated mostclearly in Figs. 1 and 3.

A chain constructed as described, is adapted to be used with a sprocketwheel 7 having the form shown in Fig. 3. This sprocket wheel is formedwith two circumferential rows of teeth 8 which are disposed slightlyapart and between which there is formed a circumferential groove 9passing continuously around the wheel. .At one side the wheel isprovided with an outwardly projecting guard or flange 10. The teeth 8 ofthe sprocket wheel are in alinement with the teeth 2 of the sprocketlinks, so that the chain may run over the sprocket wheel in the mannerindicated in Fig. 3; in this way the fins 6 project down into the groove9, and prevent any possibility of the chain being dislodged by a lateralmovement of the sprocket wheel. In this Way a very simple chain isformed which will transmit the driving force, but which cannot becomeaccidentally dislodged from its position. A chain of this description isespecially adapted for transmitting the power of automobiles or similarvehicles.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. A sprocket chain having Sprocket links with teeth formed on the edgesthereof adapted to engage the sprocket teeth of a sprocket wheel, andintermediate guide links projecting downwardly beyond said teeth andadapted to be received in a guide groove in the sprocket wheel, saidlinks and projecting beyond the teeth of said sprocket links, said guidelinks being adapted to lie in a groove formed in the sprocket wheel toprevent the dislodgment of the chain.

3. A sprocket chain having sprocket links disposed in pairs attachedalternately outside and inside of each other, guide links disposed inpairs and disposed between the members of the outside sprocket links,said guide links having fins projecting beyond the teeth of saidsprocket links, adapted to run in the groove formed on the sprocketwheel, and plain links lying between the inside links.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

ROBERT SAFFORD MCIN'DYRE. Witnesses:

LAFAYETTE GILL, F. G. HALL.

